Malicious PDF — malware analysis report

Static analysis result for SHA-256 686bc78b8b80cb18…

MALICIOUS

PDF

49.1 KB Created: 2021-05-12 00:10:13 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 8fa6fd71367e73a2a020faca147bfde4 SHA-1: 783b6913539f15a3837c430fe4059f5053f9566c SHA-256: 686bc78b8b80cb18f9c8f617945ca4305db336eaf7284ec3a18ea79d54a771ff
122 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by an ML classifier. It uses a password-protected-archive lure. The file routes users through malicious redirector infrastructure and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8642

Heuristics 5

  • PDF links to a 'free generator / game hack' redirector high PDF_GAME_HACK_REDIRECT_LURE
    PDF's clickable action targets a redirector of the form /app/<id>/<slug>-game-hack — the landing-page shape of a large SEO 'free spins / generator / game hack' lure family that funnels victims through rotating disposable hosts to a malware/scam payload. The multi-link variants also trip ML/link-farm rules; this catches the single-link variants that otherwise score clean.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • External URI info PDF_URI
    PDF contains an external URL action
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://netcdn.xyz/app/431946152/rbx-free-robux-game-hack PDF link annotation
    • http://handimanlibrary.org/repository/coin-master-hack-apk-33-download_GM406889139.pdfIn PDF document text
    • http://handimanlibrary.org/repository/robux-hack-no-verification_GM431946152.pdfIn PDF document text
    • http://handimanlibrary.org/repository/coin-master-daily-free-spins-25_GM406889139.pdfIn PDF document text
    • http://handimanlibrary.org/repository/how-to-get-minecraft-for-free-ios_GM479516143.pdfIn PDF document text
    • http://handimanlibrary.org/repository/coin-master-spin-hack-2021_GM406889139.pdfIn PDF document text
    • http://handimanlibrary.org/repository/how-to-get-free-robux-no-human-verification_GM431946152.pdfIn PDF document text
    • http://handimanlibrary.org/repository/2021-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://handimanlibrary.org/repository/instant-robux_GM431946152.pdfIn PDF document text
    • http://handimanlibrary.org/repository/free-robux-site_GM431946152.pdfIn PDF document text
    • http://handimanlibrary.org/repository/coin-master-spin-cheat_GM406889139.pdfIn PDF document text
    • http://handimanlibrary.org/repository/free-robux-2021-no-verification_GM431946152.pdfIn PDF document text
    • http://handimanlibrary.org/repository/what-games-give-you-robux_GM431946152.pdfIn PDF document text
    • http://handimanlibrary.org/repository/earn-free-robux_GM431946152.pdfIn PDF document text
    • http://handimanlibrary.org/repository/free-robux-without-survey_GM431946152.pdfIn PDF document text
    • http://handimanlibrary.org/repository/coin-master-free-spins-link-today-blogspot_GM406889139.pdfIn PDF document text
    • http://handimanlibrary.org/repository/scary-larry-roblox_GM431946152.pdfIn PDF document text
    • http://handimanlibrary.org/repository/how-to-get-free-robux-on-pc_GM431946152.pdfIn PDF document text
    • http://handimanlibrary.org/repository/free-roblox-gift-card_GM431946152.pdfIn PDF document text
    • http://handimanlibrary.org/repository/free-robux-no-human-verification-generator_GM431946152.pdfIn PDF document text
    • http://handimanlibrary.org/repository/coin-master-daily-spin-link_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004ae6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4AE6 26100 bytes
SHA-256: a48403611bc0023157235d6d369b8a89dbbf694a12373a08bc82de1717d613b7
font_01_sfnt_off0000877b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x877B 2824 bytes
SHA-256: 45bf821f81e84f4aa8d8374f492b182b36404f38b462c7dc471deaad6ab5c104
font_02_sfnt_off00009124.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9124 5696 bytes
SHA-256: 450e3ee45915afe13702bf1d587eb8b9ad88a8d2113419ac9f2fd116a828e139
font_03_sfnt_off00009e35.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9E35 18012 bytes
SHA-256: 03f7603bc8a5695bbd0c39958af3fcfd5a932cbc13eba7563a8e8ca8b5ca4208

Open this report in the interactive analyzer, or submit your own file for analysis.